net: remove useless pfmemalloc setting

When __alloc_skb() allocates an skb from fast clone cache,
setting pfmemalloc on the clone is not needed.

Clone will be properly initialized later at skb_clone() time,
including pfmemalloc field, as it is included in the
headers_start/headers_end section which is fully copied.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/core/skbuff.c

@@ -271,7 +271,6 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask,
 		atomic_set(&fclones->fclone_ref, 1);
 
 		fclones->skb2.fclone = SKB_FCLONE_CLONE;
-		fclones->skb2.pfmemalloc = pfmemalloc;
 	}
 out:
 	return skb;